[1] A. eximius webs consist of a roughly oval, horizontal sheet of nonadhesive silk, retreats constructed from leaves curled and held in place with silk, and vertical threads, referred to as "knockdown threads", that extend from the sheet and retreats to branches above the web.

[1] Web maintenance is performed mainly by adult females and by juveniles at the third instar or older, which repair structural damage and reinforce existing sheets.

Debris, such as prey remains, empty egg sacs, and plant material, are removed by dropping over the edge of the web.

Juveniles frequently attempt to perform maintenance tasks, but most larger debris are removed by adult females.

It has also been questioned whether the alloparental behavior of Anelosimus eximius was an ancestral trait or if the species had to overcome discrimination[when defined as?]

Tending females groom and clean the surface of their sacs, and occasionally remove silk from them or move them to other leaves.

Juveniles stay beneath leaf canopies until their third instar, at which point they move to the upper strands of the web.

[1] Anelosimus eximius are notable for favoring large prey items, which make up a much larger portion of their diet compared to solitary or less social species.

A. eximius webs typically makes use of non-sticky "knockdown strands" up to several meters long which are strung across open flyways through which larger flying insects tend to move.

When attacking larger prey or animals capable of causing injury, the spiders use stickier silk than otherwise.

Small webs, particularly ones without remaining adult spiders, are also vulnerable to storms due to the limited ability of juveniles or solitary females to repair them.

[2] These patterns of distribution lead to A. eximius colonies often occurring in aggregations of two to forty distinct webs, which may be separated from other such clusters by distances ranging from a few meters to several kilometers.

Neighboring colonies are typically in close proximity, and may share the same knockdown threads or be in physical contract.

Gene flow is low to absent among distinct clusters, as individual spiders do not typically move between unrelated colonies.

Consequently, populations of A. eximius exist as mosaics consisting of groups of geographically and genetically distinct colony clusters.